An attendee takes a photograph of a logo ahead of an Apple Inc. event at the company’s headquarters in California, U.S. (Photographer: Michael Short/Bloomberg)

Apple Isn't the First Stock to Take a Shot at $1 Trillion

(Bloomberg) -- Warren Buffett boosting his stake in Apple Inc. has pundits predicting it is poised to hit $1 trillion in market value. But the iPhone maker isn’t the first to tread that lofty path.

PetroChina Co. crossed the milestone back in November 2007, when its mainland shares almost tripled in value in their Shanghai trading debut.

But the state-controlled energy company dropped below that level within a day and had fallen below $500 billion by March 2008. It now ranks fifth among Chinese companies, at less than half the market values of e-retailing behemoth Alibaba Group Holding Ltd. and e-payment giant Tencent Holdings Ltd. -- which both traded above the equivalent of $500 billion at several points this year.

Apple Isn't the First Stock to Take a Shot at $1 Trillion

Apple topped $500 billion for the first time in February 2012. Currently, Inc., Microsoft Corp., Google’s parent Alphabet Inc. and Facebook Inc. are all half-trillion-dollar-plus companies.

Microsoft was the first company to reach $500 billion in July 1999. It was about half China’s annual gross domestic product at the time. China’s GDP is now more than $11 trillion.

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